&lt;title&gt;Hybrid passive/active damping for robust multivariable acoustic control in composite plates&lt;/title&gt;

Veeramani, Sudha; Wereley, Norman M.

doi:10.1117/12.239041

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Once again, the change of sign of the error is noticed around the G' frequency. The least error is seen to be at the modes (1,2) and (3,1). Finally, when the G' value is picked at 200 Hz, the pointof if the bandwidth is increased, the errors are likely to be unacceptably high.…”

Section: Experimental Validationmentioning

confidence: 86%

“…Damping of disturbance transmitted into enclosures may be achieved by different approaches. A hybrid method, utilizing piezo-actuation of damped plate to enhance stability robustness of the controller, was suggested in our earlier work [3]. The current research examines an actuated, damped sandwich plate which represents the vibrating wall of an enclosure.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

<title>Modeling and experimental validation of a sandwich plate with isotropic face plates and viscoelestic core</title>

Veermani

Wereley

1997

Smart Structures and Materials 1997: Passive Damping and Isolation

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We analyze and experimentally validate an analysis of a sandwich plate structure, where anisotropic face plates sandwich a viscoelastic core. Existing analytical models have been modified to incorporate piezo-actuation in anisotropic and 3-layered thin plates, using the variational energy method. The 3-layered sandwich consists of anisotropic face-plates with surface bonded piezo-electric actuators, and a viscoelastic core. The analysis includes the membrane and transverse energies in the face plates, and shear in the viscoelastic core. A constant, complex shear modulus was used for the dissipative core, thus frequency and temperature dependence of viscoelastic propoerties is neglected in this model. Simplified forms of the equations are stated based on neglecting shear in face-plates. Experiments were conducted on sandwich plates with aluminum face-plates under clamped boundary conditions to validate the simplified model. Symmetric and asymmetric sandwiches were tested. The maximum error in the first eight natural frequency predictions obtained via the assumed modes solution is less than <10%. Analytical studies on the influence of the number of assumed modes in the Galerkin approximation, and the core storage modulus variation, were conducted. The importance of the in-plane extension modes in sandwich plate analysis was demonstrated. Error in the first natural frequency is nearly 100% when in-plane modes are ignored; error reduces and converges to 6.7% as number of modes is increased to 16 in each of the in-plane directions for each face plate.

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Section: Experimental Validationmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 98%

<title>Modeling and experimental validation of a sandwich plate with isotropic face plates and viscoelestic core</title>

Veermani

Wereley

1997

Smart Structures and Materials 1997: Passive Damping and Isolation

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“…Koshigoe et al [14] utilized piezoelectric actuators mounted on the surface of a thin rectangular panel for active suppression of sound transmission due to an external source into a backing enclosure. Veeramani and Werely [15] employed piezoelectric actuators in a mixed passive-active damping framework to suppress acoustic radiation from a sandwich composite viscoelastic panel backed by a 3D rectangular cavity. Balachandran et al [16] used microphone sensors and surface-bonded piezoceramic (PZT) actuator patches for feed-forward active noise transmission control into a 3D rectangular enclosure having a flexible boundary.…”

Section: Introductionmentioning

confidence: 99%

Elasto-acoustic response damping performance of a smart cavity-coupled electro-rheological fluid sandwich panel

Hasheminejad

Fadavi-Ardakani

2017

Jnl of Sandwich Structures & Materials

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The transient vibroacoustic response mitigation of a rectangular sandwich panel with an adaptive electro-rheological fluid core layer, and backed by a hard-walled reverberant rectangular parallelepiped acoustic enclosure, is investigated. The problem is analyzed in a multidisciplinary framework that involves the thin sandwich electro-rheological fluid-based plate model, the 3D wave equation for the acoustic enclosure domain, the first-order Kelvin–Voigt viscoelastic model for the electro-rheological fluid core material, the pertinent structure–fluid compatibility relation, and the inherently robust sliding mode control strategy. The generalized Fourier expansion method is utilized to set up the fully coupled system equations in the state–space domain, and the fourth-order Runge-Kutta time marching technique is then utilized to compute both uncontrolled and controlled coupled system responses in three basic external loading configurations. It is found that increasing the cavity depth has a substantial restraining effect on the overall sound pressure response levels, while the electro-rheological fluid-panel displacement response amplitudes experience only moderate reductions. Also, a purely passive electro-rheological fluid-based system is observed not to be very effective for vibroacoustic response suppression of the cavity-coupled structural system, while the overall success of the applied sliding mode control methodology in reasonable reduction of both panel displacement and sound pressure time response amplitudes is demonstrated. Furthermore, the control system authority with regard to the acoustic cavity pressure (panel displacement) is found to moderately (slightly) decrease as the cavity depth increases. Limiting cases are considered and accuracy of the suggested analytical model is checked against the output of an FEM package as well as with the accessible literature results. Moreover, the main components of a prospective experimental platform for verifying the performance of proposed vibroacoustic control system are briefly described.

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“…They developed an analytical noise control model, and demonstrated its e!ectiveness via numerical simulation. Veeramani and Wereley [2] experimentally investigated the control of noise transmission through a #exible plate with piezoactuators backed by a rigid cavity. Besides these two studies, numerous research literatures on active noise control using piezoelectric actuators and sensors can be found in reference [3].…”

Section: Introductionmentioning

confidence: 99%

An Electrorheological Fluid-Based Plate for Noise Reduction in a Cabin: Experimental Results

Choi¹,

Seo²,

Kim³

et al. 2001

Journal of Sound and Vibration

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<title>Hybrid passive/active damping for robust multivariable acoustic control in composite plates</title>

Cited by 7 publications

References 17 publications

<title>Modeling and experimental validation of a sandwich plate with isotropic face plates and viscoelestic core</title>

<title>Modeling and experimental validation of a sandwich plate with isotropic face plates and viscoelestic core</title>

Elasto-acoustic response damping performance of a smart cavity-coupled electro-rheological fluid sandwich panel

An Electrorheological Fluid-Based Plate for Noise Reduction in a Cabin: Experimental Results

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